CLI utilities for FIDO/WebAuthn developers.

Setup

Some tools require third-party Python dependencies:

• cryptography

If these are not bundled with your system Python, you must install the dependencies, for example, using uv:

uv install
echo "o2NmbXR...gYfmg" | uv run ./att_obj.py

Tools

• att_obj.py: takes an unpadded base64url-encoded string on stdin and produces a JSON version of it.

Other recommended tools

• cbor-diag-cli